endotherm

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Related to Endotherms: homeotherms

endotherm

[′en·də‚thərm]
(physical chemistry)
In differential thermal analysis, a graph of the temperature difference between a sample compound and a thermally inert reference compound (commonly aluminum oxide) as the substances are simultaneously heated to elevated temperatures at a predetermined rate, and the sample compound undergoes endothermal or exothermal processes.
(physiology)
An animal that produces enough heat from its own metabolism and employs devices to retard heat loss so that it is able to keep its body temperature higher than that of its environment.
References in periodicals archive ?
Both regimes II and III may experience a partial melting and reformation of the metastable crystals, which is shown by the disappearance of the cold crystallization exotherm and the appearance of the secondary melting endotherms.
The following variables were considered: system type (freshwater, marine, or terrestrial), species richness, the number of food chain paths (FCPs), mean food chain length (MFCL), the relative proportion of endotherms at the herbivore level, maximum food chain length (FCL), connectance, linkage density, average diet breadth, average prey vulnerability, average body size at the autotroph, herbivore and apex predator positions, and the difference between predator-prey body size at the herbivore and apex predator positions.
However, the study of ectothermic vertebrates might provide a fruitful alternative for such studies, providing a system where one can potentially separate the consequences of altering metabolism and body temperature, since these two functions are not as intricately intertwined in ectotherms as they are in endotherms.
In figure 3b, the lower ethylene content copolymer exhibits a prominent melting peak at ~98[degrees]C, corresponding to primary crystallites, and a weak endotherm at ~50[degrees]C, corresponding to secondary crystallites.
The differences between ectotherms and endotherms diminish as size increases, because of the simple fact that a body with a large mass maintains a very constant temperature.
In summary, contrary to endotherms where the fitness consequences of body size and shape on heat loss are believed to have resulted in geographic patterns known as Bergmann's and Allen's rules, many ectothermic organisms display a pattern of body-size variation referred to as the converse of Bergmann's Rule (Masaki 1978) that is thought to have evolved in response to geographic patterns in season length.
However, even endotherms may hibernate or overwinter in refugia (as T.
Notably, the Australian example involves a large ectothermic predator rather than endotherms as in Africa.
Like today's sea-faring tuna and great white sharks, dinos share some traits with both ectotherms (what people mean when they say "cold-blooded") and endotherms ("warm-blooded").
Although birds are endotherms, with high metabolic rates and body temperature (40[degrees]C-43[degrees]C) protecting them from many diseases, some birds appear more susceptible to melioidosis.
On the other hand, in an interspecific analysis Anderson and Jetz (2005) found that FMR was inversely related to ambient temperature during the FMR measurement period, which is a reasonable expectation considering that resting energy expenditure rate increases with decreasing temperatures in endotherms regulating body temperature.